mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 09:40:57 +07:00
e217413964
In preparation of tweaking the accelerated AES chaining mode routines to be able to use a 5-way stride, implement the core routines to support processing 5 blocks of input at a time. While at it, drop the 2 way versions, which have been unused for a while now. Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
550 lines
12 KiB
ArmAsm
550 lines
12 KiB
ArmAsm
/*
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* linux/arch/arm64/crypto/aes-modes.S - chaining mode wrappers for AES
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*
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* Copyright (C) 2013 - 2017 Linaro Ltd <ard.biesheuvel@linaro.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* included by aes-ce.S and aes-neon.S */
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.text
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.align 4
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#ifndef MAX_STRIDE
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#define MAX_STRIDE 4
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#endif
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aes_encrypt_block4x:
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encrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7
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ret
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ENDPROC(aes_encrypt_block4x)
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aes_decrypt_block4x:
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decrypt_block4x v0, v1, v2, v3, w3, x2, x8, w7
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ret
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ENDPROC(aes_decrypt_block4x)
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#if MAX_STRIDE == 5
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aes_encrypt_block5x:
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encrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7
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ret
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ENDPROC(aes_encrypt_block5x)
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aes_decrypt_block5x:
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decrypt_block5x v0, v1, v2, v3, v4, w3, x2, x8, w7
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ret
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ENDPROC(aes_decrypt_block5x)
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#endif
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/*
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* aes_ecb_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks)
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* aes_ecb_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks)
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*/
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AES_ENTRY(aes_ecb_encrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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enc_prepare w3, x2, x5
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.LecbencloopNx:
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subs w4, w4, #4
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bmi .Lecbenc1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
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bl aes_encrypt_block4x
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st1 {v0.16b-v3.16b}, [x0], #64
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b .LecbencloopNx
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.Lecbenc1x:
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adds w4, w4, #4
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beq .Lecbencout
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.Lecbencloop:
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ld1 {v0.16b}, [x1], #16 /* get next pt block */
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encrypt_block v0, w3, x2, x5, w6
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lecbencloop
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.Lecbencout:
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ldp x29, x30, [sp], #16
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ret
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AES_ENDPROC(aes_ecb_encrypt)
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AES_ENTRY(aes_ecb_decrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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dec_prepare w3, x2, x5
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.LecbdecloopNx:
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subs w4, w4, #4
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bmi .Lecbdec1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
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bl aes_decrypt_block4x
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st1 {v0.16b-v3.16b}, [x0], #64
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b .LecbdecloopNx
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.Lecbdec1x:
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adds w4, w4, #4
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beq .Lecbdecout
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.Lecbdecloop:
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ld1 {v0.16b}, [x1], #16 /* get next ct block */
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decrypt_block v0, w3, x2, x5, w6
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lecbdecloop
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.Lecbdecout:
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ldp x29, x30, [sp], #16
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ret
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AES_ENDPROC(aes_ecb_decrypt)
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/*
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* aes_cbc_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks, u8 iv[])
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* aes_cbc_decrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks, u8 iv[])
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*/
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AES_ENTRY(aes_cbc_encrypt)
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ld1 {v4.16b}, [x5] /* get iv */
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enc_prepare w3, x2, x6
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.Lcbcencloop4x:
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subs w4, w4, #4
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bmi .Lcbcenc1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
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eor v0.16b, v0.16b, v4.16b /* ..and xor with iv */
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encrypt_block v0, w3, x2, x6, w7
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eor v1.16b, v1.16b, v0.16b
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encrypt_block v1, w3, x2, x6, w7
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eor v2.16b, v2.16b, v1.16b
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encrypt_block v2, w3, x2, x6, w7
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eor v3.16b, v3.16b, v2.16b
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encrypt_block v3, w3, x2, x6, w7
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st1 {v0.16b-v3.16b}, [x0], #64
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mov v4.16b, v3.16b
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b .Lcbcencloop4x
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.Lcbcenc1x:
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adds w4, w4, #4
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beq .Lcbcencout
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.Lcbcencloop:
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ld1 {v0.16b}, [x1], #16 /* get next pt block */
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eor v4.16b, v4.16b, v0.16b /* ..and xor with iv */
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encrypt_block v4, w3, x2, x6, w7
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st1 {v4.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lcbcencloop
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.Lcbcencout:
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st1 {v4.16b}, [x5] /* return iv */
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ret
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AES_ENDPROC(aes_cbc_encrypt)
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AES_ENTRY(aes_cbc_decrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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ld1 {v7.16b}, [x5] /* get iv */
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dec_prepare w3, x2, x6
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.LcbcdecloopNx:
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subs w4, w4, #4
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bmi .Lcbcdec1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
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mov v4.16b, v0.16b
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mov v5.16b, v1.16b
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mov v6.16b, v2.16b
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bl aes_decrypt_block4x
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sub x1, x1, #16
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eor v0.16b, v0.16b, v7.16b
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eor v1.16b, v1.16b, v4.16b
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ld1 {v7.16b}, [x1], #16 /* reload 1 ct block */
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eor v2.16b, v2.16b, v5.16b
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eor v3.16b, v3.16b, v6.16b
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st1 {v0.16b-v3.16b}, [x0], #64
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b .LcbcdecloopNx
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.Lcbcdec1x:
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adds w4, w4, #4
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beq .Lcbcdecout
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.Lcbcdecloop:
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ld1 {v1.16b}, [x1], #16 /* get next ct block */
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mov v0.16b, v1.16b /* ...and copy to v0 */
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decrypt_block v0, w3, x2, x6, w7
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eor v0.16b, v0.16b, v7.16b /* xor with iv => pt */
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mov v7.16b, v1.16b /* ct is next iv */
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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bne .Lcbcdecloop
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.Lcbcdecout:
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st1 {v7.16b}, [x5] /* return iv */
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ldp x29, x30, [sp], #16
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ret
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AES_ENDPROC(aes_cbc_decrypt)
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/*
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* aes_cbc_cts_encrypt(u8 out[], u8 const in[], u32 const rk[],
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* int rounds, int bytes, u8 const iv[])
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* aes_cbc_cts_decrypt(u8 out[], u8 const in[], u32 const rk[],
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* int rounds, int bytes, u8 const iv[])
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*/
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AES_ENTRY(aes_cbc_cts_encrypt)
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adr_l x8, .Lcts_permute_table
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sub x4, x4, #16
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add x9, x8, #32
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add x8, x8, x4
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sub x9, x9, x4
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ld1 {v3.16b}, [x8]
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ld1 {v4.16b}, [x9]
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ld1 {v0.16b}, [x1], x4 /* overlapping loads */
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ld1 {v1.16b}, [x1]
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ld1 {v5.16b}, [x5] /* get iv */
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enc_prepare w3, x2, x6
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eor v0.16b, v0.16b, v5.16b /* xor with iv */
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tbl v1.16b, {v1.16b}, v4.16b
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encrypt_block v0, w3, x2, x6, w7
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eor v1.16b, v1.16b, v0.16b
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tbl v0.16b, {v0.16b}, v3.16b
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encrypt_block v1, w3, x2, x6, w7
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add x4, x0, x4
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st1 {v0.16b}, [x4] /* overlapping stores */
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st1 {v1.16b}, [x0]
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ret
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AES_ENDPROC(aes_cbc_cts_encrypt)
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AES_ENTRY(aes_cbc_cts_decrypt)
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adr_l x8, .Lcts_permute_table
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sub x4, x4, #16
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add x9, x8, #32
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add x8, x8, x4
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sub x9, x9, x4
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ld1 {v3.16b}, [x8]
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ld1 {v4.16b}, [x9]
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ld1 {v0.16b}, [x1], x4 /* overlapping loads */
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ld1 {v1.16b}, [x1]
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ld1 {v5.16b}, [x5] /* get iv */
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dec_prepare w3, x2, x6
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tbl v2.16b, {v1.16b}, v4.16b
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decrypt_block v0, w3, x2, x6, w7
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eor v2.16b, v2.16b, v0.16b
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tbx v0.16b, {v1.16b}, v4.16b
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tbl v2.16b, {v2.16b}, v3.16b
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decrypt_block v0, w3, x2, x6, w7
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eor v0.16b, v0.16b, v5.16b /* xor with iv */
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add x4, x0, x4
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st1 {v2.16b}, [x4] /* overlapping stores */
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st1 {v0.16b}, [x0]
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ret
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AES_ENDPROC(aes_cbc_cts_decrypt)
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.section ".rodata", "a"
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.align 6
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.Lcts_permute_table:
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.byte 0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7
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.byte 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.byte 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
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.previous
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/*
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* aes_ctr_encrypt(u8 out[], u8 const in[], u8 const rk[], int rounds,
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* int blocks, u8 ctr[])
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*/
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AES_ENTRY(aes_ctr_encrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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enc_prepare w3, x2, x6
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ld1 {v4.16b}, [x5]
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umov x6, v4.d[1] /* keep swabbed ctr in reg */
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rev x6, x6
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cmn w6, w4 /* 32 bit overflow? */
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bcs .Lctrloop
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.LctrloopNx:
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subs w4, w4, #4
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bmi .Lctr1x
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add w7, w6, #1
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mov v0.16b, v4.16b
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add w8, w6, #2
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mov v1.16b, v4.16b
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add w9, w6, #3
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mov v2.16b, v4.16b
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rev w7, w7
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mov v3.16b, v4.16b
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rev w8, w8
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mov v1.s[3], w7
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rev w9, w9
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mov v2.s[3], w8
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mov v3.s[3], w9
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ld1 {v5.16b-v7.16b}, [x1], #48 /* get 3 input blocks */
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bl aes_encrypt_block4x
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eor v0.16b, v5.16b, v0.16b
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ld1 {v5.16b}, [x1], #16 /* get 1 input block */
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eor v1.16b, v6.16b, v1.16b
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eor v2.16b, v7.16b, v2.16b
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eor v3.16b, v5.16b, v3.16b
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st1 {v0.16b-v3.16b}, [x0], #64
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add x6, x6, #4
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rev x7, x6
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ins v4.d[1], x7
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cbz w4, .Lctrout
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b .LctrloopNx
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.Lctr1x:
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adds w4, w4, #4
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beq .Lctrout
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.Lctrloop:
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mov v0.16b, v4.16b
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encrypt_block v0, w3, x2, x8, w7
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adds x6, x6, #1 /* increment BE ctr */
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rev x7, x6
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ins v4.d[1], x7
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bcs .Lctrcarry /* overflow? */
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.Lctrcarrydone:
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subs w4, w4, #1
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bmi .Lctrtailblock /* blocks <0 means tail block */
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ld1 {v3.16b}, [x1], #16
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eor v3.16b, v0.16b, v3.16b
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st1 {v3.16b}, [x0], #16
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bne .Lctrloop
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.Lctrout:
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st1 {v4.16b}, [x5] /* return next CTR value */
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ldp x29, x30, [sp], #16
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ret
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.Lctrtailblock:
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st1 {v0.16b}, [x0]
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b .Lctrout
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.Lctrcarry:
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umov x7, v4.d[0] /* load upper word of ctr */
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rev x7, x7 /* ... to handle the carry */
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add x7, x7, #1
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rev x7, x7
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ins v4.d[0], x7
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b .Lctrcarrydone
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AES_ENDPROC(aes_ctr_encrypt)
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/*
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* aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
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* int blocks, u8 const rk2[], u8 iv[], int first)
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* aes_xts_decrypt(u8 out[], u8 const in[], u8 const rk1[], int rounds,
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* int blocks, u8 const rk2[], u8 iv[], int first)
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*/
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.macro next_tweak, out, in, tmp
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sshr \tmp\().2d, \in\().2d, #63
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and \tmp\().16b, \tmp\().16b, xtsmask.16b
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add \out\().2d, \in\().2d, \in\().2d
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ext \tmp\().16b, \tmp\().16b, \tmp\().16b, #8
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eor \out\().16b, \out\().16b, \tmp\().16b
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.endm
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.macro xts_load_mask, tmp
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movi xtsmask.2s, #0x1
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movi \tmp\().2s, #0x87
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uzp1 xtsmask.4s, xtsmask.4s, \tmp\().4s
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.endm
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AES_ENTRY(aes_xts_encrypt)
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stp x29, x30, [sp, #-16]!
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mov x29, sp
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ld1 {v4.16b}, [x6]
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xts_load_mask v8
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cbz w7, .Lxtsencnotfirst
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enc_prepare w3, x5, x8
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encrypt_block v4, w3, x5, x8, w7 /* first tweak */
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enc_switch_key w3, x2, x8
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b .LxtsencNx
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.Lxtsencnotfirst:
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enc_prepare w3, x2, x8
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.LxtsencloopNx:
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next_tweak v4, v4, v8
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.LxtsencNx:
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subs w4, w4, #4
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bmi .Lxtsenc1x
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ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 pt blocks */
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next_tweak v5, v4, v8
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eor v0.16b, v0.16b, v4.16b
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next_tweak v6, v5, v8
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eor v1.16b, v1.16b, v5.16b
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eor v2.16b, v2.16b, v6.16b
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next_tweak v7, v6, v8
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eor v3.16b, v3.16b, v7.16b
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bl aes_encrypt_block4x
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eor v3.16b, v3.16b, v7.16b
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eor v0.16b, v0.16b, v4.16b
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eor v1.16b, v1.16b, v5.16b
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eor v2.16b, v2.16b, v6.16b
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st1 {v0.16b-v3.16b}, [x0], #64
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mov v4.16b, v7.16b
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cbz w4, .Lxtsencout
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xts_reload_mask v8
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b .LxtsencloopNx
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.Lxtsenc1x:
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adds w4, w4, #4
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beq .Lxtsencout
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.Lxtsencloop:
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ld1 {v1.16b}, [x1], #16
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eor v0.16b, v1.16b, v4.16b
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encrypt_block v0, w3, x2, x8, w7
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eor v0.16b, v0.16b, v4.16b
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st1 {v0.16b}, [x0], #16
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subs w4, w4, #1
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beq .Lxtsencout
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next_tweak v4, v4, v8
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b .Lxtsencloop
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.Lxtsencout:
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st1 {v4.16b}, [x6]
|
|
ldp x29, x30, [sp], #16
|
|
ret
|
|
AES_ENDPROC(aes_xts_encrypt)
|
|
|
|
|
|
AES_ENTRY(aes_xts_decrypt)
|
|
stp x29, x30, [sp, #-16]!
|
|
mov x29, sp
|
|
|
|
ld1 {v4.16b}, [x6]
|
|
xts_load_mask v8
|
|
cbz w7, .Lxtsdecnotfirst
|
|
|
|
enc_prepare w3, x5, x8
|
|
encrypt_block v4, w3, x5, x8, w7 /* first tweak */
|
|
dec_prepare w3, x2, x8
|
|
b .LxtsdecNx
|
|
|
|
.Lxtsdecnotfirst:
|
|
dec_prepare w3, x2, x8
|
|
.LxtsdecloopNx:
|
|
next_tweak v4, v4, v8
|
|
.LxtsdecNx:
|
|
subs w4, w4, #4
|
|
bmi .Lxtsdec1x
|
|
ld1 {v0.16b-v3.16b}, [x1], #64 /* get 4 ct blocks */
|
|
next_tweak v5, v4, v8
|
|
eor v0.16b, v0.16b, v4.16b
|
|
next_tweak v6, v5, v8
|
|
eor v1.16b, v1.16b, v5.16b
|
|
eor v2.16b, v2.16b, v6.16b
|
|
next_tweak v7, v6, v8
|
|
eor v3.16b, v3.16b, v7.16b
|
|
bl aes_decrypt_block4x
|
|
eor v3.16b, v3.16b, v7.16b
|
|
eor v0.16b, v0.16b, v4.16b
|
|
eor v1.16b, v1.16b, v5.16b
|
|
eor v2.16b, v2.16b, v6.16b
|
|
st1 {v0.16b-v3.16b}, [x0], #64
|
|
mov v4.16b, v7.16b
|
|
cbz w4, .Lxtsdecout
|
|
xts_reload_mask v8
|
|
b .LxtsdecloopNx
|
|
.Lxtsdec1x:
|
|
adds w4, w4, #4
|
|
beq .Lxtsdecout
|
|
.Lxtsdecloop:
|
|
ld1 {v1.16b}, [x1], #16
|
|
eor v0.16b, v1.16b, v4.16b
|
|
decrypt_block v0, w3, x2, x8, w7
|
|
eor v0.16b, v0.16b, v4.16b
|
|
st1 {v0.16b}, [x0], #16
|
|
subs w4, w4, #1
|
|
beq .Lxtsdecout
|
|
next_tweak v4, v4, v8
|
|
b .Lxtsdecloop
|
|
.Lxtsdecout:
|
|
st1 {v4.16b}, [x6]
|
|
ldp x29, x30, [sp], #16
|
|
ret
|
|
AES_ENDPROC(aes_xts_decrypt)
|
|
|
|
/*
|
|
* aes_mac_update(u8 const in[], u32 const rk[], int rounds,
|
|
* int blocks, u8 dg[], int enc_before, int enc_after)
|
|
*/
|
|
AES_ENTRY(aes_mac_update)
|
|
frame_push 6
|
|
|
|
mov x19, x0
|
|
mov x20, x1
|
|
mov x21, x2
|
|
mov x22, x3
|
|
mov x23, x4
|
|
mov x24, x6
|
|
|
|
ld1 {v0.16b}, [x23] /* get dg */
|
|
enc_prepare w2, x1, x7
|
|
cbz w5, .Lmacloop4x
|
|
|
|
encrypt_block v0, w2, x1, x7, w8
|
|
|
|
.Lmacloop4x:
|
|
subs w22, w22, #4
|
|
bmi .Lmac1x
|
|
ld1 {v1.16b-v4.16b}, [x19], #64 /* get next pt block */
|
|
eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
|
|
encrypt_block v0, w21, x20, x7, w8
|
|
eor v0.16b, v0.16b, v2.16b
|
|
encrypt_block v0, w21, x20, x7, w8
|
|
eor v0.16b, v0.16b, v3.16b
|
|
encrypt_block v0, w21, x20, x7, w8
|
|
eor v0.16b, v0.16b, v4.16b
|
|
cmp w22, wzr
|
|
csinv x5, x24, xzr, eq
|
|
cbz w5, .Lmacout
|
|
encrypt_block v0, w21, x20, x7, w8
|
|
st1 {v0.16b}, [x23] /* return dg */
|
|
cond_yield_neon .Lmacrestart
|
|
b .Lmacloop4x
|
|
.Lmac1x:
|
|
add w22, w22, #4
|
|
.Lmacloop:
|
|
cbz w22, .Lmacout
|
|
ld1 {v1.16b}, [x19], #16 /* get next pt block */
|
|
eor v0.16b, v0.16b, v1.16b /* ..and xor with dg */
|
|
|
|
subs w22, w22, #1
|
|
csinv x5, x24, xzr, eq
|
|
cbz w5, .Lmacout
|
|
|
|
.Lmacenc:
|
|
encrypt_block v0, w21, x20, x7, w8
|
|
b .Lmacloop
|
|
|
|
.Lmacout:
|
|
st1 {v0.16b}, [x23] /* return dg */
|
|
frame_pop
|
|
ret
|
|
|
|
.Lmacrestart:
|
|
ld1 {v0.16b}, [x23] /* get dg */
|
|
enc_prepare w21, x20, x0
|
|
b .Lmacloop4x
|
|
AES_ENDPROC(aes_mac_update)
|